KO4-20 KO4-15 KO4-01

Which one do i want for a 98 a4 5 speed and what software basically what shoul i be looking for!! all te details

 

k04-15 - the others are for different engines

 

K04-15. The others have different outlet configurations and wont be direct fit.

 

ko4-001 transversedirect swap
ko4-15 longitude direct swap
ko4-2x (x meaning some variations) from a 225 TT

The direct swaps have the same compressor as a ko3s not ko3 and a slightly larger turbine housing (why it makes power longer).